Has anyone had any experience driving a mini cooper with the H-Sport 27mm front and 25mm (on middle setting) rear sway bars with H-Sport springs?

If I install the H-Sport springs is it absolutely necessary to install koni shocks and adjustable control arms? (99% of my driving is streets, but i'm extremely aggresive)

 

I had h-sports rear sway plus springs with stock shocks. I think middle whole was perfect for this setting. Once I added the front sway bar, I had to put the back one to the stiffest to get the same steering feel. My advice is don't bother with the front one. I have Konis now and yes change is dramatic. Stock shocks with h-sports is really harsh compared to Konis.